Ink cartridge



FIG. 1 is a top, front, right side perspective view of an ink cartridge according to my design;

FIG. 2 is a top, rear, left side perspective view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the figures represent portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for an ink cartridge, as shown and described. 